基于Arduino单片机，在安卓手机上安装蓝牙串口助手，连上小车的蓝牙模块HC05就可以用安装蓝牙串口助手发送指令，控制小车- Bluetooth serial installation assistant on Android phones, and even the car Bluetooth module HC05 you can send commands using Bluetooth serial port installation assistant control car

一个很详细的教程，能够实现土壤湿度的一个检测，通过arduino,并且有实际的教程，包括原理的说明和连线。(A very detailed tutorial that enables a test of soil moisture, through Arduino, and has practical tutorials, including a descr iption of the principles and wiring.)